<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>

<body>
  <div id="app">
    <ul>
      <li v-for="(item,index) in list">
        {{item}}
      </li>
    </ul>
    <button @click="fn">走一走</button>
  </div>

  <script>
    new Vue({
      el: '#app',
      data: {
        list: ['帅哥', '程序员', '美女']
      },
      methods: {
        fn() {
          this.list = this.list.concat(this.list.splice(0, 1))
        }
      },
    })
  </script>
</body>

</html>